The most important thing to check is the adapter that comes with most Webers. It is usually two plates and the screws are too long. You will never be able to cure the vacuum leaks on a Weber unless you grind off the last two threads on both sets of screws. I did this and no longer have any vacuum leaks or that, oh so nice, whistling noise under the hood.

BTDT, should have mentioned it in my earlier reply

I have always tried to steer folks back to factory for F series. Seriously. We all know Hollys suck a$$ off road unless you do a bunch of mods (WTF is a whistle tube anyway?). IMHE, Webers work fine but you have to dork around with linkage, don't have control over the choke, The air cleaner housing doesn't fit, you have adapters (see above) and all kinds of little doo daas. Factory Aisan works great at what ever angle you are off road, gives GREAT mileage (compared to Hollys and Webers), and everything fits (air cleaner housing, linkage, fuel lines, ect.). And they last a long A$$ed time between rebuilds.

But yeah. What Mike said. Those last couple threads on the adapter screws need to come off on the Weber kits I have dorked around with.

...So it's winter time, let's get this baby figured out once and for all Jeff! What do you say? Treeroot's got the magic numbers posted (if you have a 38/38), so all that needs to be done is to take it apart and see what you have! Who's in, Friday at corsair23's house? We'll have it done before you come home from work!

...So it's winter time, let's get this baby figured out once and for all Jeff! What do you say? Treeroot's got the magic numbers posted (if you have a 38/38), so all that needs to be done is to take it apart and see what you have! Who's in, Friday at corsair23's house? We'll have it done before you come home from work!

...So it's winter time, let's get this baby figured out once and for all Jeff! What do you say? Treeroot's got the magic numbers posted (if you have a 38/38), so all that needs to be done is to take it apart and see what you have! Who's in, Friday at corsair23's house? We'll have it done before you come home from work!